CN102852114B - Reservoir sediment deposition calculating method - Google Patents
Reservoir sediment deposition calculating method Download PDFInfo
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- CN102852114B CN102852114B CN201210339592.0A CN201210339592A CN102852114B CN 102852114 B CN102852114 B CN 102852114B CN 201210339592 A CN201210339592 A CN 201210339592A CN 102852114 B CN102852114 B CN 102852114B
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- 239000013049 sediment Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000008021 deposition Effects 0.000 title abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 78
- 238000009825 accumulation Methods 0.000 claims description 16
- 239000004576 sand Substances 0.000 claims description 14
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000009795 derivation Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000012876 topography Methods 0.000 abstract 1
- 238000004062 sedimentation Methods 0.000 description 9
- 238000000205 computational method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention discloses a reservoir sediment deposition calculating method. The reservoir sediment deposition calculating method comprises the following steps: according to water and sediment data and design conditions of a reservoir, calculating the total reservoir sediment deposition in a certain deposition level year of the reservoir; according to topographic data of the reservoir, calculating the design capacity of the reservoir below the design water level of the reservoir; calculating the sediment deposition per unit of water; according to the topographic data of the reservoir, calculating the water level and the sectional area of each section of the reservoir, and drawing a relationship curve; according to the relationship curve, deducing the water passing area below the design water level, namely obtaining the water volume per unit of width; dividing by the sediment density, and obtaining the deposition volume per unit of width of each section; and looking up and calculating the sediment deposition elevation of each section, and obtaining the deposition topography in a certain deposition level year of the reservoir. The method has the advantages as follows: according to the topographic data of the reservoir, the deposition volume of each section is quickly calculated; without using a conventional trial method, the deposition elevation of each section is quickly calculated; and the total deposition volume calculated by the method is consistent to the total deposition volume of the reservoir.
Description
Technical field
The present invention relates to a kind of reservoir sediment accumulation algorithm, particularly relate to the reservoir sediment accumulation form of shortage data and the computational methods of alluvial landform.
Background technology
In current reservoir deposits engineering design, for the engineering lacking detailed silt data, reservoir sediment accumulation calculates the general equilibrium ratio that adopts and falls method.But the method has significant limitation, for non-cone sedimentation formation, or storehouse sand is larger, does not reach the reservoir of silt-stable state within Design of Reservoirs base period, then inapplicable.And the siltation volume difference of the reservoir sedimentation amount that obtains of the equilibrium ratio method of falling and hydrologic and silt material computation is comparatively large, must, by the mode of tentative calculation, make the siltation volume sum of each section conform to reservoir sedimentation total amount.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of method that better can calculate reservoir sediment accumulation distribution.
The technical solution adopted in the present invention is: a kind of method that reservoir sediment accumulation calculates, and comprises the following steps:
The first step, according to reservoir hydrologic, silt data and design conditions, calculates the reservoir sediment accumulation total amount W of reservoir alluvial forcasted years
husky;
Second step, according to reservoir topographic(al) data, calculates Design of Reservoirs water level Z
iffollowing reservoir capacity W
water;
3rd step, tries to achieve reservoir sediment accumulation total amount W according to first, second step
huskyand design water level lower storage reservoir storage capacity W
water, calculate unit of water body silt amount of drift sand C
s:
C
s=W sand/W water
4th step, according to reservoir topographic(al) data, calculates reservoir each section water level Z and cross-sectional area A, and draws relation curve Z-A;
5th step, according to each section water level obtained in the 4th step and cross-sectional area relation curve Z-A, Derivation Design water level Z
iffollowing discharge area A
water, namely obtain single wide water body volume V
water, then be multiplied by unit of water body silt amount of drift sand C
s, then divided by silt density p, obtain each section list wide alluvial volume V
husky, namely obtain each section alluvial area A
husky, wherein unit width B=1m:
V
water=A
water× B
V
husky=C
s× V
water/ ρ
A
husky=V
husky/ B
6th step, according to each section alluvial area A calculated in the 5th step
huskythe each section water level obtained with the 4th step and cross-sectional area relation curve Z-A, look into calculation and obtain each section Sediment Siltation elevation Z
husky, thus, obtain the alluvial landform of reservoir alluvial forcasted years.
Described reservoir lacks actual measurement the warehouse-in hydrology, silt data.
The invention has the beneficial effects as follows, in conjunction with reservoir topographic(al) data, calculate each section siltation volume fast, avoid the method for traditional tentative calculation, calculate the sedimentation elevation of each section rapidly, and the alluvial body total amount that the method calculates conforms to reservoir sedimentation total amount.
Accompanying drawing explanation
Fig. 1 is certain reservoir range DM1 water level of calculating of method of the present invention and curve of areas Z-A.
Fig. 2 is certain reservoir sedimentation longitudinal plan that method of the present invention obtains.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
The method that reservoir sediment accumulation of the present invention calculates, comprises the following steps:
The first step, according to water and sediment in reservoir data and design conditions, calculates the reservoir sediment accumulation total amount W of reservoir alluvial forcasted years
husky;
Second step, according to reservoir topographic(al) data, calculates Design of Reservoirs water level Z
iffollowing reservoir capacity W
water;
3rd step, tries to achieve reservoir sediment accumulation total amount W according to first, second step
huskyand design water level lower storage reservoir storage capacity W
water, calculate unit of water body silt amount of drift sand C
s:
C
s=W
husky/ W
water
4th step, according to reservoir topographic(al) data, calculates reservoir each section water level Z and cross-sectional area A, and draws relation curve Z-A;
5th step, according to each section water level obtained in the 4th step and cross-sectional area relation curve Z-A, Derivation Design water level Z
iffollowing discharge area A
water, namely obtain single wide water body volume V
water, then be multiplied by unit of water body silt amount of drift sand C
s, then divided by silt density p, obtain each section list wide alluvial volume V
husky, namely obtain each section alluvial area A
husky, wherein unit width B=1m:
V
water=A
water× B
V
husky=C
s× V
water/ ρ
A
husky=V
husky/ B
6th step, according to each section alluvial area A calculated in the 5th step
huskythe each section water level obtained with the 4th step and cross-sectional area relation curve Z-A, look into calculation and obtain each section Sediment Siltation elevation Z
husky, thus, obtain the alluvial landform of reservoir alluvial forcasted years.
In formula: C
s---unit of water body silt amount of drift sand (kg/m
3);
Wx---(ten thousand t) for reservoir area siltation forcasted years silt total amount;
W
water---storage capacity (ten thousand m below certain design water level
3);
V
husky---volume (m shared by the wide silt amount of drift sand of alluvial forcasted years section list
3);
V
water---the wide water body (m of the list under certain design water level
3);
A
water---the discharge area (m under certain design water level
2);
A
husky---section Sediment Siltation area (m
2);
ρ---silt density (kg/m
3).
Illustrate the example that the inventive method calculates below:
If known: certain reservoir operation scheme 272m, corresponding storage capacity W
waterbe 1,008 ten thousand m
3, dam site year warehouse-in husky amount 3072t, storehouse sand is comparatively large frequently, is 3940.This project is without actual measurement the warehouse-in hydrology, silt data; Reservoir is little and short, and the water-sediment movement of front storehouse, dam section is more complicated, does not possess the primary condition that detailed erosion and deposition calculates.
This engineering design service life is 50 years, the reservoir calculated thus 50 years silt amount of drift sand W
huskybe 15.36 ten thousand t.Then unit of water body silt amount of drift sand ρ is 15.24kg/m
3.
Below for this reservoir range DM1, method of the present invention is described:
According to the topographic(al) data of this reservoir range DM1, calculate the discharge area A that different water level Z is corresponding, namely obtain the corresponding cross-sectional area A(of water level Z of section DM1 in table 1), draw section DM1 water level Z and cross-sectional area A relation curve Z-A(and see Fig. 1).According to water level and the area curve Z-A of section DM1, look into and calculate design water level Z
if(Z
if=normal pool level 272m) corresponding discharge area A
water=18293m
2, i.e. single wide water body volume V
water=18293m
3, then be multiplied by unit of water body silt amount of drift sand C
s=15.24kg/m
3, then divided by silt density p=1.2t/m
3, obtain the list wide alluvial volume V of section DM1
husky=232m
3, namely obtain the alluvial area A of section DM1
husky=232m
2.Again according to water level and the area curve Z-A of section DM1, look into and calculate to obtain section sedimentation elevation Z
husky=222.18m, namely obtains the Sediment Siltation landform of section DM1.
Analogize in proper order, according to the topographic(al) data of each section of reservoir, repeat the sedimentation elevation Z that above step can obtain each section
husky.The reservoir sediment accumulation achievement calculated is in table 2 and Fig. 2.
Table 1 section DM1 water level and area data (Z-A)
Certain reservoir sedimentation outcome table of table 2
Above-described embodiment is only for illustration of technological thought of the present invention and feature, its object is to enable those skilled in the art understand content of the present invention and implement according to this, only can not limit the scope of the claims of the present invention with the present embodiment, namely the equal change done of all disclosed spirit or modification, still drop in the scope of the claims of the present invention.
Claims (2)
1. a method for reservoir sediment accumulation calculating, is characterized in that, comprise the following steps:
The first step, according to reservoir hydrologic, silt data and design conditions, calculates the reservoir sediment accumulation total amount W of reservoir alluvial forcasted years
husky;
Second step, according to reservoir topographic(al) data, calculates Design of Reservoirs water level Z
iffollowing reservoir capacity W
water;
3rd step, tries to achieve reservoir sediment accumulation total amount W according to first, second step
huskyand design water level lower storage reservoir storage capacity W
water, calculate unit of water body silt amount of drift sand C
s:
C
s=W
husky/ W
water
4th step, according to reservoir topographic(al) data, calculates reservoir each section water level Z and cross-sectional area A, and draws relation curve Z-A;
5th step, according to each section water level obtained in the 4th step and cross-sectional area relation curve Z-A, Derivation Design water level Z
iffollowing discharge area A
water, namely obtain single wide water body volume V
water, then be multiplied by unit of water body silt amount of drift sand C
s, then divided by silt density p, obtain each section list wide alluvial volume V
husky, namely obtain each section alluvial area A
husky, wherein unit width B=1m:
V
water=A
water× B
V
husky=C
s× V
water/ ρ
A
husky=V
husky/ B
6th step, according to each section alluvial area A calculated in the 5th step
huskythe each section water level obtained with the 4th step and cross-sectional area relation curve Z-A, look into calculation and obtain each section Sediment Siltation elevation Z
husky, thus, obtain the alluvial landform of reservoir alluvial forcasted years.
2. the method for reservoir sediment accumulation calculating according to claim 1, is characterized in that, described reservoir lacks actual measurement the warehouse-in hydrology, silt data.
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| CN201210339592.0A CN102852114B (en) | 2012-09-13 | 2012-09-13 | Reservoir sediment deposition calculating method |
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| CN102852114B true CN102852114B (en) | 2015-01-07 |
Family
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106320259A (en) * | 2016-09-06 | 2017-01-11 | 长江水利委员会长江科学院 | Three Gorges Reservoir flood season sediment peak scheduling method also capable of realizing sediment ejection |
| CN106337388A (en) * | 2016-09-06 | 2017-01-18 | 长江水利委员会长江科学院 | Method for determining cascade reservoir interval incoming sediment amount and distributing cascade reservoir interval incoming sediment amount along flowing path |
| CN111006736A (en) * | 2019-12-31 | 2020-04-14 | 太原理工大学 | A Sensing Device for Dynamically Measuring Sedimentation and Volume Changes in Reservoir |
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| CN106802172A (en) * | 2017-01-19 | 2017-06-06 | 河南省水利勘测有限公司 | A kind of method that reservoir capacity is accurately monitored and analyzed |
| CN108427654B (en) * | 2018-01-26 | 2021-10-22 | 黄河流域水土保持生态环境监测中心 | Rapid calculation method for silted storage capacity of medium-sized or over-sized check dam |
| CN108320095A (en) * | 2018-01-31 | 2018-07-24 | 黄河水利委员会黄河水利科学研究院 | A kind of reservoir sedimentation methods of risk assessment |
| CN108509716A (en) * | 2018-03-30 | 2018-09-07 | 浙江知水信息技术有限公司 | A method of water is calculated by section water level |
| CN109632254B (en) * | 2018-11-23 | 2021-04-06 | 西安理工大学 | Method for determining transport ratio of river sediment under influence of dam reservoir water conservancy project |
| CN111611539B (en) * | 2020-04-02 | 2023-05-02 | 广东邦鑫数据科技股份有限公司 | Section extraction method, system and device for water depth measurement data and storage medium |
| CN113806851B (en) * | 2021-10-20 | 2022-05-20 | 交通运输部天津水运工程科学研究所 | Method for predicting channel siltation amount caused by hydrodynamic change of dredging and trenching |
| CN113887087B (en) * | 2021-11-02 | 2022-08-19 | 交通运输部天津水运工程科学研究所 | Method and system for calculating channel siltation caused by sediment transport in tidal river reach |
| CN114299136B (en) * | 2021-12-31 | 2023-03-24 | 西北农林科技大学 | Method and device for measuring silt deposition amount of silt dam, computer and storage medium |
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| JP5057749B2 (en) * | 2006-11-21 | 2012-10-24 | 明星電気株式会社 | Method and apparatus for measuring sediment concentration in running water |
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| CN102305944A (en) * | 2011-07-28 | 2012-01-04 | 李典基 | Underwater sedimentation amount detecting analysis processing system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106320259A (en) * | 2016-09-06 | 2017-01-11 | 长江水利委员会长江科学院 | Three Gorges Reservoir flood season sediment peak scheduling method also capable of realizing sediment ejection |
| CN106337388A (en) * | 2016-09-06 | 2017-01-18 | 长江水利委员会长江科学院 | Method for determining cascade reservoir interval incoming sediment amount and distributing cascade reservoir interval incoming sediment amount along flowing path |
| CN106320259B (en) * | 2016-09-06 | 2018-07-17 | 长江水利委员会长江科学院 | A kind of Three Gorges Reservoir flood season sand peak dispatching method for taking into account sand discharge |
| CN111006736A (en) * | 2019-12-31 | 2020-04-14 | 太原理工大学 | A Sensing Device for Dynamically Measuring Sedimentation and Volume Changes in Reservoir |
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